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Finding the Fourth Proportional to 3,858.84, 5,784.92 and 1,395.43

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Solution

The fourth proportional to 3,858.84, 5,784.92 and 1,395.43 is: 2,091.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,858.84 : 5,784.92 = 1,395.43 : x
  2. Step 2: Convert to fraction form
    3,858.84/5,784.92 = 1,395.43/x
  3. Step 3: Cross multiply
    3,858.84x = 5,784.92 × 1,395.43
  4. Step 4: Simplify right side
    3,858.84x = 8,072,434.71
  5. Step 5: Solve for x
    x = 8,072,434.71/3,858.84
  6. Step 6: Final answer
    x = 2,091.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.